#include<iostream>
#include<cmath>
using namespace std;
int main(int argc, char)
{
double x, a, y;
cout << "Input a, x: ";
cin >> x >> a;
if (x < -30.1)
y = (38.4 + x * a) / (pow(cos(x), 2) + 1.1);
else if (x < 2.1)
y = log(fabs(x)) + 3.6;
else
y = sqrt(x) + a * x;
cout << y << endl;
return 0;
}
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